Problem: The :help command lacks command termination tests.
Solution: Add tests for command termination at "|", "^M" and "^J".
- Check special handling of "|" in arguments.
- Update the Vim syntax file.
closes: #18932
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>